Avery DTR Risers Metal for All Avery Trays 118mm Black Ref 404B-118

Avery steel plated risers give you extra space between your filing trays. What you need are steel plated connectors to give you extra space. If you add four of these longer length risers in-between each tray, it will give you a clearance of 118mm.

Price: 1.93 from Office Stationery